Iprovement in apparatus for evaporating



W. S. WORTHINGTON.

Arrangement for He'atngEvaporating Pans.

No. 22,601. Patented' Jan. l1, 1859.

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llVlPiROi/'EMENT IN APPARATUS FOR EVPGRATING.

Specification forming part of Letters Patent N0. 222,60H, dated January1l, 1859.

To @ZZ whom t may concern:

Be it known that I, WILLIAM S. WORTH- ING'LON, of Newtown, in the countyof Queens and State of New York, have invented a new and improvedarrangement of grated iireplaces and iiues for heating cvaporating-pansin the manufacture ofsalt and other substances obtained by evaporation;and I do hereby declare that the -lollowing is a full, clear, and exactdescription of the same, reference being had to the accompanyingdraw-ings, making part of this specification, in which- Figure l is aside view of a pan with part vof its outer casing removed to show thearrangement of the grates and lues. Fig. 2 is a transverse verticalsection of the same. Fig. 3 is a horizontal section of the same.

The objects of this invention are the economical use of coal as fuel forheating1 evaporating-pans, and the application of the heat in such amanner as to prevent the burning ofthe salt or substance precipitated onthe bottom ofthe pan, and the consequent burning out of the said pan.

To enable others to make and use my invention, I will proceed todescribe its construe ti on and operation.

A is the pan, made of cast-iron, u ith a Iiat bottom, and with its sidesparallel longitudinally, but inclining outward from bottom .to top, andwith vertical ends.

C Gare side casings ot' iron or masonry extending from the top to thebottom oi' the pan and the whole length of each side, and eachcontaining several fire-places whose fronts and bottoms are composed ofgrates a a, and their sides of transverse partitions I) b and c c, ofiron or masonry, extending` from the outer walls of the casings to thesides of the pan, and whose backs are formed by the sides of' the panitself. rIhese iireplaces are atequal distances apart, and opposite toeach there is a door, d, in the outer wall of the casing C to admit thecoal, and in each door is an airregister, c, to admit air below thegrate to support combustion. 'The partitions b b extend'from the top ofthe pan and external walls of the casing C downward as far as thebottoms of the grates, and have openings f f below them, and thepartitions c c extend l'rom the bottom of the pan and external walls ofthe casing G to or above the bottom of the grate, and have openings g gabove them.

The spaces h h between the 'lire-places constitute ilues. At one end ofeach casing there is an opening leading to a chimney.

|The pan being iilled with brine, and lires having been made in theseveral grates, and the doors d d closed, the operation is as follows:Air in sufficient quantity to support combustion is admitted under theseveral grates by the registers c e in their respective doors, and thesmoke and gaseous products of combustion pass from the several gratesthrough the passages f j g g and fines 7i h, as indicated by arrows inFig. l, toward those ends of the casings C C at which is situated thechimney, the inflammable gaseous products of combustion escaping fromthe first grate in each easing, passing through the adjacent due h, andbeing wholly orfor the most part consumed by passing through the-secondone, and those escaping through the second one passing through the nexti'lue h, and be-` ing wholly or for the most part consumed by passingthrough the third one, and so on throughout the whole series, the heatedproducts thus passing over the whole of the sides of the pan, whichpresent a very extensive heating-surface, and a very perfect andcomplete eombustion of the gases being effected before arriving at thechimney, which serves to produce a draft and carry off the incombustiblegases. While the whole of both sides of the pan constituteheating-surfaces, the bottom of the pan is left comparatively cool, sothat the salt or other substance which is caused to be precipitatedthereon is not caused to cake and burn, so as to'be dillieult ofremoval, and to cause the burning of the pan, as is the casein thesalt-pans heated in the ordinary way-viz., by fires or fines under theirbottoms; and no precipitation of any consequence taking place on theheatingsnrfaces. the conduet-ing of the heat to the liquid is notinterfered with. y

The pan A may be of any convenient length, and may be made of platesiitted and secured together by screws or rivets. Several short pans maybe employed, placed end to end, and heated by a single and continuoustrain of communicating fire-places on each side of the train of pans,which may be extended to as great a length as the continuous trains ofcommunicating lire-places can be used with Thepans may have upright oradvantage.

curved sides; but I consider the inelined form The arrangement of aseries of two or more of the sides to afford the best provision for an'grated fire-places, a Z1 c, and communicating economical application ofheat. An artificial passages f g and flues h h in a easing, C, on draftmay be employed; but I have found by eaeh or either side of a pan ortrain oi" pans, experiment o'n a considerable scale that mysubstantially as and for the purpose herein arrangement of nre-placesWorks Well with set forth. the natural draft of the chimney.

I do not claim, broadly7 any arrangement WILLIAM S. W'ORTHINGTON. offires and flues for heating the sides without heating the bottoms ofevaporating-pans; but Witnesses:

Vhat I claim as my invention, and desire to WV. HAUFF, secure by LettersPatent, isv WM. TUsoHE.

